ELAFLEX Information 5.08E
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Information 5.08 E ZVA Slimline 2 GRVP Vapour Recovery Nozzle ZVA Slimline 2 GRVP with fully integrated vapour regulating valve (proportional valve): ● Variable control of the vapour volume flow depen- ding on the fuel flow delivery. ● ON/OFF - function: Secure closure of the vapour line when there is no fuel flow. - Important when oper- ating two or more hoses with one vacuum pump. ● Simple dry test (A/L ratio adjustment): manual opening of the GRVP valve to simulate a 40 l/min fuel delivery. ● No need for additional regulators inside the dispenser. Only a vacuum pump has to be connected. Therefore the GRVP provides an ideal low cost option for retrofitting existing dispensers. ● The valve adds only 40 g to the nozzle compared to a standard ZVA Slimline 2 GR. Due to the full integration of the GRVP into the nozzle body the hose length does not have to be corrected. MODIFICATION OF ZVA SLIMLINE 2 GR: If you want to modify an existing ZVA Slimline 2 GR to type GRVP: Change the standard vapour recovery suction inlet EA 092.1 with the GRVP vapour recovery suction inlet EA 092.2. Remove the strainer from the nozzle and unscrew the vapour valve insert (EK 096) with the tool EW 19-22. After greasing the O-Rings EO 048, screw in the GRVP valve (EA 020) into the nozzle body. Fit strainer before connecting to the COAX hose. Before use check that the fuel area is tight (no drip- ping from the vapour spout). Leaks may be caused by dirt during assembly or damaged O-rings. This work should be done in a suitable workshop facility and not in the field. COMMISSIONING / PUTTING INTO USE: ZVA Slimline 2 GRVP is supplied ready for use and can be directly connected to COAX VR hoses. The vacuum pump manufacturers instructions for the required pump speed to achieve the necessary vapour performance must be observed, as laid down by the TÜV certificate. The fuel performance of the dispenser is controlled by using the high latch position on the nozzle and if necessary, reduced to 40 l/min (for example using a bypass valve). Afterwards, the fine tuning of the system is effected by adjustment of the regulating screw ➀. August 2008 ZVA Slimline 2 GRVP Regulating Screw ➀ VR suction inlet EA 092.2 Factory marking ‘GRVP’ under the scuffguard GRVP (EA 020) COAX Hose TÜV STAGE II CERTIFICATES: New system approvals for ZVA Slimline 2 GRVP by the TÜV Süd in use with the following vacuum pumps: Dürr Typ MEX 0831- 11 Certificate No. 85-2.159 Gardner Denver Thomas 8014-5.0, 8014-6.0 Certificate No. 85-2.160 All previous approval certificates for ZVA 200 GRVP remain valid also for ZVA Slimline 2 GRVP, by using the supplementary certificate TÜV Süd No. 85-2.xxx. The GRVP (EA 020) replaces the standard vapour valve insert EK 096, see left hand side. Vapour Valve Insert GRVP (EK 096) (EA 020) EO 048 The GRVP (EA 020) is supplied ready for installa- tion, pre-adjusted and tested for vapour tightness. Only the O-rings are supplied as spare parts. In the case of a malfunction the whole GRVP unit is to be replaced. TECHNISCHE ÄNDERUNGEN VORBEHALTEN · NACHDRUCK UND KOPIEN NUR MIT UNSEREM EINVERSTÄNDNIS · Specifications subject to change without notice · Copyright ELAFLEX
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Transcript of ELAFLEX Information 5.08E
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Information 5.08 E
ZVA Slimline 2 GRVP Vapour Recovery Nozzle
ZVA Slimline 2 GRVP with fully integrated vapourregulating valve (proportional valve):
Variable control of the vapour volume flow de pen -ding on the fuel flow delivery.
ON/OFF - function: Secure closure of the vapour linewhen there is no fuel flow. - Important when oper -ating two or more hoses with one vacuum pump.
Simple dry test (A/L ratio adjustment): manualopening of the GRVP valve to simulate a 40 l/minfuel delivery.
No need for additional regulators insidethe dispenser. Only a vacuum pumphas to be connected. Therefore theGRVP provides an ideal low costoption for retrofitting existing dispensers.
The valve adds only 40 g to the nozzle comparedto a standard ZVA Slimline 2 GR. Due to the fullintegration of the GRVP into the nozzle body thehose length does not have to be corrected.
MODIFICATION OF ZVA SLIMLINE 2 GR:
If you want to modify an existing ZVA Slimline 2 GRto type GRVP:
Change the standard vapour recovery suction inletEA 092.1 with the GRVP vapour recovery suctioninlet EA 092.2.
Remove the strainer from the nozzle and unscrewthe vapour valve insert (EK 096) with the tool EW 19-22. After greasing the O-Rings EO 048,screw in the GRVP valve (EA 020) into the nozzlebody. Fit strainer before connecting to the COAXhose.
Before use check that the fuel area is tight (no drip-ping from the vapour spout). Leaks may be causedby dirt during assembly or damaged O-rings.
This work should be done in a suitable workshopfacility and not in the field.
COMMISSIONING / PUTTING INTO USE:
ZVA Slimline 2 GRVP is supplied ready for use andcan be directly connected to COAX VR hoses. Thevacuum pump manufacturers instructions for therequired pump speed to achieve the necessaryvapour performance must be observed, as laid downby the TV certificate.
The fuel performance of the dispenser is controlledby using the high latch position on the nozzle and ifnecessary, reduced to 40 l/min (for example using abypass valve). Afterwards, the fine tuning of thesystem is effected by adjustment of the regulatingscrew .
August 2008
ZVA Slimline 2 GRVP
RegulatingScrew
VR suction inlet EA 092.2Factory marking GRVP
under the scuffguard
GRVP (EA 020)
CO
AX
Ho
se
TV STAGE II CERTIFICATES:
New system approvals for ZVA Slimline 2 GRVP by theTV Sd in use with the following vacuum pumps:
Drr Typ MEX 0831- 11Certificate No. 85-2.159
Gardner Denver Thomas 8014-5.0, 8014-6.0 Certificate No. 85-2.160
All previous approval certificates for ZVA 200 GRVP remain valid also for ZVA Slimline 2 GRVP, by using thesupplementary certificate TV Sd No. 85-2.xxx.
The GRVP (EA 020) replaces the standard vapour valve insertEK 096, see left hand side.
Vapour Valve Insert GRVP(EK 096) (EA 020)
EO 048
The GRVP (EA 020) is supplied ready for installa-tion, pre-adjusted and tested for vapour tightness.
Only the O-rings are supplied as spare parts. In the case of a malfunction the whole GRVP unit is tobe replaced.
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DRY TEST:
Take the ZVA Slimline 2 GRVP from the nozzle boot. Thevacuum pump starts.
Tightly connect the Elaflex universal connector UMAX 2 ontothe vapour spout and connect its hose to the gas meter [fig.1].
Connnect the signal cable of the gas meter to the handheldcontrol. Switch on handheld control. If possible, enter thecorrection factor of the vapour recovery system (see relevantTV certificate).
The handheld control is set to simulate the max. volumetric flowauthorized for the vapour recovery system (see certificate).After checking the connections to the gas meter and theUMAX 2 connector (visual inspection of the sealing surfaces),the simulation of the petrol flow is started on the handheldcontrol.
To open the GRVP valve, let the nozzle hang down verticallyand make a vertical impact downwards. The valve opensdue to gra vi ty [fig.2]. In this position, turn the regulationscrew with the hexa gonal spanner EW SK 3 to adjust thevapour volume rate [fig.3].
Correction factor 'K': As ambient air is sucked in during thedry test, the calculated air volumetric flow must be dividedby the correction factor. If this is not already done automa-tically by the handheld control, the vapour recovery rate iscalculated using the following equation:
WET TEST:
Take the ZVA Slimline 2 GRVP from the nozzle boot. Thevacuum pump starts.
Tightly connect the Elaflex universal connector UMAX 2 ontothe vapour spout and connect its hose to the gas meter [fig.1].Prevent the vapour recovery from being influenced by themeasurement accumulation of liquids in the connecting hose.Please check the connections to the gas meter and theUMAX 2 connector (visual inspection of the sealing surfaces)
Start measurement with dispensing approx. 20 litres of petrolinto a canister.
To open the GRVP valve, let the nozzle hang down verticallyand make a vertical impact downwards. The valve opensdue to gra vi ty [fig.2]. In this position, turn the regulationscrew with the hexa gonal spanner EW SK 3 to adjust thevapour volume rate [fig.3].
For the volume measurement method the display of thegas meter has to be recorded at the start and at the end ofthe petrol flow. The difference yields the recovered vapourvolume. The petrol volume is read out on the calibrateddispenser.
Correction factor 'K': As ambient air is sucked in during thedry test, the calculated air volumetric flow must be divided bythe correction factor. If this is not already done automaticallyby the handheld control, the vapour recovery rate is calculatedusing one of the following equations:
For further details please refer to:
VDI 4205 Part 1-3:2003 (German / English)VdTV-Merkblatt Tankanlagen 908 Part 2
R vapour recovery rate, in %
VG calculated air volumetric flow during the measurement (average value), in l/min
VG determined gas volume in litres
VK volumetric flow simulated by the handheld control, in l/min
VK volume of dispensed petrol during the measurement in l/min
VG determined volume flow rate in l/min (mean value)
K correction factor (as specified in the certificate)
t measuring time in s
.
.
.
R = 100.
.
VG.VK
.K
R = 100.
VG
VK
.K
(1)
R = 100.
VG
VK
.K
(2).
t
60
1
3
air
UMAX 2 incl. connecting
hose
bellows-typegas meter
tank / canister (> 20 l)
RegulatingScrew
EW SK 3
increasevapourvolume
2
decreasevapourvolume
OPEN
(for wet test only)
signal cable
handheld control
UMAX 2 incl. connecting hose
(for dry test only)
ZVA Slimline 2 GRVP
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